Stuck listening to the enraged ramblings of an involuntarily committed schizophrenic, though half his words are unintelligible, the self-righteous indignation comes through.

It occurs to me that righteous rage is a mood enhancer. Perhaps even the more sane of us (or more functionally insane) also will invent reasons to fume to lift ourselves up from pathetic obscurity to the ranks of the St George skewering demons with our profanities.

The question of interference patters is central to light theory. I would like to share some pictures that show the same patterns in very unusual situations. The first picture has been taken with the open body of a digital camera, and a laser beam a pen) shining into the body. As you can see, the same patterns appear that are usually associated with constructive and destructive interference see in the double slit experiment, or in the use of two thin plates showing so-called Newton rings.